Brian Daniels diesel workbench

Discussion in 'Area 51' started by Brian Daniels, 15 May 2014.

  1. eastsidepilot

    eastsidepilot Western Thunderer

    'old up mate 'aint you a bit too young to be talking in 64th's :D....stick that in your CAD system and you'll choke it.

    Big Train James likes this.
  2. mickoo

    mickoo Western Thunderer

    0.4mm give or take ;)

    You can use imperial and scale as such......I think, pretty sure Jim (US) has his set that way.

    I've got mine set to 0.05mm which is good enough for etch work as a whole I find.
    eastsidepilot likes this.
  3. eastsidepilot

    eastsidepilot Western Thunderer

    I'm not sure if this is true but I'm sure I read somewhere that the Russians built copies of the Boeing Superfortress, re engineered in metric which caused problems.

    Sorry Brian don't mean to hi-jack your excellent thread.
  4. JimG

    JimG Western Thunderer

    All the CAD systems I have used can work quite happily in Imperial units - Fusion360, AutoCAD LT, Draftsight, NanoCAD. It's great for taking dimensions from drawings in Imperial units which can then be re-scaled to metric if required.

  5. SimonT

    SimonT Western Thunderer

    They did. In 1944 some (memory is 4-5) B-29s diverted to Soviet held territory due to lack of fuel/damage. The crews were eventually returned but not the airframes. Some of the aircraft were taken to the Tupolev factory where one was stripped down to reverse engineer a copy to meet Stalin's demands for an aircraft to attack the USA with the Atomic bomb that the Soviets were developing from information obtained through a massive spying effort (This aircraft would not have the range for the job but obtained technology that could). Within a year the first soviet aircraft was ready for inspection. This was a massive achievement as the American aircraft used imperial thickness materials and alloys unknown in Russia; they also had to develop cloned engines. The Soviet copy was less than 1000lbs heavier than the 120 000lb American aircraft.

    From this Tupolev developed a line of aircraft that were capable of attacking the USA and that are still in service today (the TU-85 Bear first flew in the early 1950s and is now receiving new attack weapons so that it can do another 20 years in service. This mirrors the B-52 Stratofortress that will do 100 years on the front line.

    Thanks Brian, SimonT is leaving the building!
    michl080 and Dog Star like this.
  6. daifly

    daifly Western Thunderer

    Ian is correct. If you want to get mathematical, 1:43.5 is an approximation of 7mm:1ft. The true value is 1:43.54285714285714(approx)!
    Last edited: 9 September 2020
  7. Brian Daniels

    Brian Daniels Western Thunderer

    No worries about a little diversion as it's an interesting read.
    Mickoo I already downloaded the valve gear bits from the Finney7 PDF :) I have built a DJH A4 with working lubricator so can I do it a second time? I got a couple of whitemetel lubricator boxes from Ragstone Models just got to make something to attach them too!
    mickoo likes this.
  8. adrian

    adrian Flying Squad

    Works fine in QCAD. :D
    Screenshot 2020-09-09 at 20.49.22.png
    eastsidepilot likes this.
  9. Yorkshire Dave

    Yorkshire Dave Western Thunderer

    And for those outside Suffolk..... 11' = 132'' :D :)
    Deano747, JasonD, Lancastrian and 3 others like this.
  10. Big Train James

    Big Train James Western Thunderer

    I have my units set to 8 decimal places, or 256ths if using architectural units. Not because I ever intend to go to such extremes when creating drawings. But rather because for me one of the primary qualities of cad is the precision involved. There's no sense in my opinion in being casual with the numbers when you can be purposeful. I'm also compulsive about things, so I tend to quibble even when it isn't necessary.

    One other thing that has changed my perspective a bit as well is diving into machining as a discipline and potential vocation. In machining terms, a 64th is almost 16 thou, 5 thou would be a generous tolerance in many cases. You might as well be doing carpentry at that point if those are the standards you're working to!!!:)):p:oops:

    I presume you're talking about snapping to a grid with this comment? If so, I never ever have the snap on, unless by accident, as it's next to the F8 ortho toggle function key and I sometimes hit F9 by mistake. I prefer to simply draw things as they are meant to be, as Autocad supports the dynamic entry of distances and angles within nearly all drawing and editing commands. It's really quite simple. :thumbs:

    Also, it's quite simple to switch from imperial to metric even if the drawing has been started in the opposite style. The "dwgunits" command will walk you through it.

    Jim (US).....should change all of my users names across multiple forums to this....
    Last edited: 10 September 2020
    mickoo and richard carr like this.
  11. michl080

    michl080 Western Thunderer

    I hope it didn't have 0.3937 times the size of the B29.


    SimonT likes this.
  12. mickoo

    mickoo Western Thunderer

    It was before morning coffee...:))
  13. eastsidepilot

    eastsidepilot Western Thunderer

    Was that 6 fl oz or 0.177441 litres ?

    D1054 likes this.